Table 4.
Comparison of graded occurrence of adverse reactions before and after implementation (examples)
| Group | Grade I | Grade II | Grade III | Grade IV | Total |
|---|---|---|---|---|---|
| Before implementation | 6 | 4 | 2 | 0 | 12 |
| After implementation | 2 | 1 | 1 | 0 | 4 |
| χ2 | - | - | - | - | 6.354 |
| P | - | - | - | - | 0.037 |
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